--- a/doc-src/TutorialI/Misc/document/Option2.tex Sun Oct 21 19:48:19 2001 +0200
+++ b/doc-src/TutorialI/Misc/document/Option2.tex Sun Oct 21 19:49:29 2001 +0200
@@ -1,13 +1,18 @@
%
\begin{isabellebody}%
\def\isabellecontext{Option{\isadigit{2}}}%
+\isamarkupfalse%
+\isamarkupfalse%
+\isamarkupfalse%
%
\begin{isamarkuptext}%
\indexbold{*option (type)}\indexbold{*None (constant)}%
\indexbold{*Some (constant)}
Our final datatype is very simple but still eminently useful:%
\end{isamarkuptext}%
-\isacommand{datatype}\ {\isacharprime}a\ option\ {\isacharequal}\ None\ {\isacharbar}\ Some\ {\isacharprime}a%
+\isamarkuptrue%
+\isacommand{datatype}\ {\isacharprime}a\ option\ {\isacharequal}\ None\ {\isacharbar}\ Some\ {\isacharprime}a\isamarkupfalse%
+%
\begin{isamarkuptext}%
\noindent
Frequently one needs to add a distinguished element to some existing type.
@@ -20,6 +25,8 @@
but it is often simpler to use \isa{option}. For an application see
\S\ref{sec:Trie}.%
\end{isamarkuptext}%
+\isamarkuptrue%
+\isamarkupfalse%
\end{isabellebody}%
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